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Answer for the clue "(genetics) an organism or cell having only one complete set of chromosomes ", 7 letters:
haploid

Word definitions for haploid in dictionaries

WordNet Word definitions in WordNet
adj. of a cell or organism having a single set of chromosomes [syn: haploidic , monoploid ] [ant: diploid , polyploid ]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Haploid \Hap"loid\ (h[a^]p"loid), a. [NL., fr. Gr. "aplo`os simple.] (Biol.) having half the number of chromosomes normally present in somatic cells; having only one chromosome of each type, and therefore having only one complete set of genes; Contrasted ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1908, from German haploid (1905), from Greek haplos "single."

Wiktionary Word definitions in Wiktionary
a. (context cytology English) Of a cell having a single set of unpaired chromosomes, such as a gamete. n. 1 A cell which is haploid. 2 An organism, such as a fungus, with haploid cells.

Usage examples of haploid.

But if we sequenced your deoxyribonucleic acid, we could choose the better one of each pair of traits you yourself had inherited, and then we could manufacture a haploid set of chromosomes containing only those better traits.

It was, of course, the existence of the haploid Flenni generation, which made the diploid Esthaans so healthy-each time the pairs of Esthaan chromosome broke apart to form a Flenn individual, every sort of recessive defect emerged without an allele to temper it.

Your natural haploid set of chromosomes would be vacuumed out of it, and a doctor would add in a full diploid set of chromosomes created using the codon writer.

And the true, complete females are diploid—except for a group of haploid structures just below their breastbones, the egg-receiver, or oviceptor, we call it.

Fertilization would be in vitro, with a possibility of choosing either of two potential pairs of female-male complements but with no basis for choice unless the genetic charts of haploids are determined precisely, which is difficult and likely to cause genetic damage.

Fertilization would be in vitro, with a possibility of choosing either of two potential pairs of female-male complements- but with no basis for choice unless the genetic charts of haploids are determined precisely, which is difficult and likely to cause genetic damage.

The tube contains a haploid (in) generative nucleus and grows downward toward the ovule at the base of the pistils.